223640858123 has 2 divisors, whose sum is σ = 223640858124. Its totient is φ = 223640858122.

The previous prime is 223640858057. The next prime is 223640858209. The reversal of 223640858123 is 321858046322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 223640858123 - 2²⁴ = 223624080907 is a prime.

It is not a weakly prime, because it can be changed into another prime (223640858723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111820429061 + 111820429062.

It is an arithmetic number, because the mean of its divisors is an integer number (111820429062).

Almost surely, 2^223640858123 is an apocalyptic number.

223640858123 is a deficient number, since it is larger than the sum of its proper divisors (1).

223640858123 is an equidigital number, since it uses as much as digits as its factorization.

223640858123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 223640858123 in words is "two hundred twenty-three billion, six hundred forty million, eight hundred fifty-eight thousand, one hundred twenty-three".